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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8fab6d8a69164e31d1653c6b2736b36e1d8f51533a337bafec7edcbac6eb95a1' 
  AND token = 'uXAfxeIhEXNlAtmCog+1X1r0oDSHjGuV2ecn06dJT+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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