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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e36d49beda1edf77c8b2324a261d6df2bdfc6b063ab16d3fa01c7b23fe61dbb2' 
  AND token = '1UB6MBmf5Q5hJWPNE2LANukS/KuicAD2iaFgjct2g6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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