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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '887c3794a5765945366d1e84e65c237925d18ec7bd73e70cb37d593f041cce0a' 
  AND token = 'wadrrgzRjwJmaFqd3Q+ATWp7EX2TFMPusq26/KslQ+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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