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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '461d7ac8d2f610ff6e8f82df094da297f451ce7c5ce4634863de0636e5d4e01d' 
  AND token = 'R0o4qyQmsfXKS5REkNn8JnKTR17uTR2NzP9jiQLnnfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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