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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '48f4760fa7363f2da459f7e606be0db69ac3d89fadd4facd53db986af7459984' 
  AND token = 'xn1pFWtXxEAM8QE/8jG/a/0eJnHFS4EPMqlDAlgtsl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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