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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32277aa22ec9e5f2aa927ab7d9b33963774aa6444508f270e423eb0c0f5f5e4c' 
  AND token = 'FezX+1yINngFY6/wZJz5kF2zaWjQ62+glEthqaUCb+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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