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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cb90c49ccfd35671ebad2b3ade1c0e6c4eba2c495768c8a5f67fa586f7406d4' 
  AND token = 'Tnj1ZANhf7pgzrjN+BN2eES+96Fe9PAlZW8HKym/q5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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