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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1bc63615dbf7b49fd48e179c04c99e847a1e886620d43ca7c9039ffc0c06b567' 
  AND token = 'TFFV9VOOCaDkOba+smlbUcpvYcX+8TG/8g9/Xh643Fk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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