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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d8d214bdb75df8d7eedf22360c9d0ef15643898a9f22a9b52a1eacbe0d97f5c' 
  AND token = 'obYrxnyHpU2WLVNs/DSae5b1jLsnTN90t9MgIeL/c9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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