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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b565e257959183c7ba3adf75449044617e9707dec2e5726ee776d58aef1bf30a' 
  AND token = '11mZ28LVeKsC5yseg63M/TUJuZHpQrUA02k1gnMUEnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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