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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dbb9ac2572170e7ae59b57a1233c49b1180d07463ac4241624fa7f5de0ec0dd2' 
  AND token = 'BGq+6tx+g8SscgA+n7A+MlrNmrNHSSZw4mmTyQxzPHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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