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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0baf285e7da8c7cf6f28c82cf66382389059754970fbeff1fb62a1b1a87878e' 
  AND token = 'ek7JUMFOMKW8Cs//6iTOiBIwdtaDcwi8CowF+TCRKt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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