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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca1af356b685b3dcbf6e80abdfd20bacae1e66dd45e01d641cda0b9e82341e45' 
  AND token = 'bNTndVHAvQ0hIO14hjSMMfM+9fLGoJDkliiMFi4aqIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00086

JSON explain

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