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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '530a138128c79929aae0c6abcb29edce13b3953a3c01dd36df54eeee2130a305' 
  AND token = '7o1eD7lHsebfnmx0JxdvIuOA4ZzfKrjBWa0QfaAtAz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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