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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a00c6be73a71408a70b45964f3fc5f7f0da8059431e0106a1372788f4626a98' 
  AND token = 'Fia04fqIojFqGazU7OBtYrPzTDNH5rlLnVffJnmnnp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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