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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6bb31e25bafe6bd815537528230b3bbe4892816e9f18a3b05f48abf68c1fc686' 
  AND token = 'OE0+0AoWByABWvZCfI4XC6llvH+jZj+EKFxrtpq8wcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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