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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8f95ddab5c50aeefb8ca5b55f019d82929a669d6d41af92f2dba18aaa94019b' 
  AND token = 'ZaJaSe4jGxPuUVutVNSdJXwgN8X3iA9iwh8+fQ5D5BU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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