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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '261165aad4660f97b30e461d1a5d527e3f4a3692ea5e3a0b431e226b7876e986' 
  AND token = '0MVbqj6jmgXkDsuQJYuajPNRPdCUkdEmr+/lwgaC1lI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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