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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0b0778eaaf129ef04343250688528126454f1c1d1cf524abd54783d4c904e4e' 
  AND token = 'TyEvlkIvZmn1Qtd2JkKwe3O+XPLli1C/PyIkdpEM7lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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