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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05fb7247992dd0e7b917a3c0a5ce54caa1b2d6ad658539cf0a5aee75032b8730' 
  AND token = 'MI5uRXnyJVWrvmYtkY5wcibBSaoxvgSUV1Dkou64X7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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