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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '228cf68c72d7dbd71b90877673534312dfb49a2ba1df3108e2b4cab0a316291e' 
  AND token = 'z7GNUK5y9ji1GSNVG2VmuZM24Ns56yK5yB7MUZFTEtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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