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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '453d992ca887c9e3512938d881f5d79f8936158a72c3852530d1b61d7268d049' 
  AND token = 'ZO6QKpSKw/EpGlSYBX+kX73ZQuP8H6Xn7v75YixW0ko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00102

JSON explain

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