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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '092f06a2e185593a2de54787ecb9ede059c91846baed2976e815cc6a91a06468' 
  AND token = 'CGAZSlWhJRlxt3Po7jwQq2oNnz9fzDse6aLxaDY8EUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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