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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2872fb58a3709aa938b0e51eacac71952f9bcccda49ef504fb98e2d7bffa66a1' 
  AND token = '9GyRgxN7pBXi1kHk1YYWMlLr6FjDI3V9RlhysGBq0Yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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