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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3f2aa8da5fc6b667637b9fad2573a5aed5372b869c264378f7934a82d272324e' 
  AND token = '/8L+I12xvZiPyDXtCMT6aItpVuMkaWbpboAOx8SZ+Dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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