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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fc395d7d9b37626ba5f3d22c0d722986d06572e6785e1e945d1c7c48d6119ef' 
  AND token = 'cOOf0YDm85pyI5EK5vC6ZATfTa59iRFGb8HEQ1r53/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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