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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e1bee98e589b1642d7206595dc2ec551fda435d3b4fe16990169121a0cc8c653' 
  AND token = 'RkCbc4iTCKkDYLV/7y2oTNXloEa9YDaxMiCT/CA2R/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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