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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41322ac64edde9dbca82ec76001c9e9e7e9185f69a3e2c8269c2f4896e733372' 
  AND token = 'F0k7Rh9d098PFkVO7v9dlTGF+wP5Nq/I2rdxVtIrvFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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