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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '895182ea046eab4470d8d6b3ed6f3180a9c25fd48561a3f0d54cadea92234960' 
  AND token = 'AHZeH2Tk362aANLLj2RWqR8NE/nhYJsTM4atA8FajME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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