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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f07faaa034417b14530242dad5e6f32c9b7fb325fa30ac892a23bd493b35e743' 
  AND token = 'lOpX7/w3SXR4iMdfy8IKIdjvtcBYDOmYIKD2zL9Lins=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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