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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d10e015a5ac24baadd374ff4d664d6cbc1e3e8b69ac02095920a6c5888c7b3e' 
  AND token = '0DpdX2JxT1K7cd59jBKGeheUbgGeFTmWsV103QD8TVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00138

JSON explain

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