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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b769864524c815f9790f534d84eb4812777a6bcfac6a09e2cd8470f9e4cd0af' 
  AND token = 'ksJw1pCiNX9iqAqEQ2ukeTh69mR6T37TLJmtzb63r5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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