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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05f5f67a8033f91957753999c52c379ec70abc7c3a50c847c1b4343a2f8adbb1' 
  AND token = 'Jd8IOrQrwDWOXfU6sfM1s7SN/Z3oF+PzAIgsfXb74x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00280

JSON explain

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