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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a95474003f318d6de035ac5c87ab056710de921b89e4e9e8d29f7d341c75e29' 
  AND token = 'eBMDVeN44UwoanPDMA+1L2R63ybhkeUfcg9vS8/Fc0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00147

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}